Function doTick

packages/zone.js/test/zone-spec/fake-async-test.spec.ts:208–210

(elapsed: number)

      fakeAsyncTestZone.run(() => {
        let totalElapsed = 0;
        function doTick(elapsed: number) {
          totalElapsed += elapsed;
        }
        setTimeout(() => {}, 10);

        testZoneSpec.tick(6, doTick);